In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

A Victorian MP has tearfully explained how changed her mind on assisted dying following the death of her teenage daughter from cancer.

Agriculture Minister Jaala Pulford today told parliament the death of her 13-year-old, Sinead, in 2014 had led to her believe parents should have the option of assisted dying, despite the great support palliative care had provided her family.

Ms Pulford voted against an assisted dying bill in 2008.

"It was ultimately less than 12 weeks from diagnosis to her death," Ms Pulford said through tears.

"Four weeks to get pain management right at hospital and then home to watch Sinead's steady decline.

"It's indescribably difficult to watch the decline and death of someone you love.